Is this addon still working for 1.337b?
It is - at least, I'm successfully using Arsenic's fix.
Here's the problem, and why I think this is worthwhile. Firstly, let's assume that zip never returns. I can see different, easier (to me) ways to write code that does a similar thing. As IC2, and BC and other stuff (like MCF) moves forward, it's going to get harder to make sure that this mod continues to work. If I want to be in this for the long haul, I want something that's going to be easy for me (or someone I hand it to) to maintain. I think if it's a reimagining of the whole suite of work, and just overlaps a bit with Zip's ideas, certainly inspired by Zip's ideas but still, unique enough to be different, then that makes me happy to make the effort.
I understand that and I'm OK with it... as long as it doesn't mean my current machines are deleted from the world and I have to build them all over again. But I agree with Creepig - The functionality of the machines as they currently stand is perfectly fine with me - I don't need more crazy machines with wild features, I'm content to have machines that simply operate like the Induction Furnace - they heat up as they perform more work and can be redstoned to stay warm.
It's understandable that you feel it is necessary to rebuild the add-on with your own code - but I don't think Zippinus is going to accuse you of "stealing" if the machines continue to work as they have. If he comes back and picks up where he left off, great - if not, I don't expect he'll take issue to you doing it your own way.